and pakistan growing even wider this morning. now that pakistan has arrested a local doctor accusing him of helping the cia set up a fake vaccination sting to track down osama bin laden. reza sayah live from islamabad this morning. how did the sting work and how did the doctor's arrest impact the already damaged relationship between the u.s. and pakistan? >> yeah. this thing straight out of a spy novel, kiran. a pakistani intelligence source tells us that this pakistani doctor is in custody. it's not clear if he's going to be charged with anything. we know he's suspected of being linked with a very intricate cia plot to confirm that, indeed, bin laden was hiding out in abbottbad. the source tells us this doctor had staged a fake vaccination campaign offering free vaccinations and polio drops to people and children in abbottbad. according to the british paper "the guardian" he hired two nurses who were going around house to house offering shots and the plan was to use the vaccine, the syringe, from the bin laden kids or extract bl